==========================================================================
 localgovt_dyads_CODEBOOK.txt
==========================================================================

SYNOPSIS:

This codebook describes data contained in the file, <localgovt_dyads_DATA.dta>.
Each observation in this data file corresponds to a single undirected dyad in 
the local government network. The units of measurement in this dyadic dataset 
are the same as the units of measurement used in the ERGM analysis, with the
exception that all data in Siena input files are rounded to the nearest integer.

VARIABLE LIST:

a1
	The string label of the first actor in the dyad.

a1_index
	The numeric index of actor 1.

a2_index
	The numeric index of the second actor in the dyad.

collabq
	1 if a linkage was reported from actor1 to actor2, from
	actor2 to actor1, or both. 0, otherwise.

sz_regional
	1 if the dyad is a structural zero because the nodes are
	contained in different regional networks, 0 otherwise. A
	single node may be a member of more than one regional network.
	A node belongs to any regional network where it was a non-
	isolate (i.e., was included in the sample and nominated another
	local government actor, or was not included in the sample but
	was nominated by a sampled local government actor).

sz_unrep
	1 if the dyad is a structural zero because the nodes are
	both not included in the sample (within any region), 0 otherwise.

isolateq
	1 if the dyad contains at least one node that is both an isolate
	(i.e., was not named as a collaborator by any local government node
	included in the regional samples), and was also not included in any
	regional sample. Such local givernment actors may appear in the data
	because they were named by a non-local government node (e.g., a federal 
	agency) which was dropped from the network when all non-local actors
	were filtered out.

ignoreq
	1 if the dyad is to be thrown out of the analysis, and 0 otherwise.
	Dyads not subject to analysis include structural zeros, and dyads 
	that include at least one isolate.

id_<variable-name> (variable set)
	The ideological distance between two actors, defined as 100 * the Euclidean 
	distance between each actor's <variable-name> ideology vector.
	
	<variable-name> may be one of the following:
	
		reg2004
			Percentage of total registered voters in 2004 in the 
			seven parties for which we have data, as well as the 
			"miscellaneous" classification.
			
		reg2004_lean
			Percentage of total registered voters in 2004 who are
			republican or democrat.
		
		reg2008
			Percentage of total registered voters in 2008 in the 
			six parties for which we have data.
				
		reg2008_lean
			Percentage of total registered voters in 2008 who are
			republican or democrat.
		
		vote2004
			Percentage of total presidential votes in 2004 that went
			to each party's candidate.
			
		reg2004_lean
			Percentage of total presidential votes in 2004 that went
			to the democratic or republican candidate (Kerry vs. Bush).
		
		reg2008
			Percentage of total presidential votes in 2008 that went
			to each party's candidate.
				
		reg2008_lean
			Percentage of total presidential votes in 2008 that went
			to the democratic or republican candidate (Obama vs. McCain).
		
		regavg
			Average voter registration scores across 2004 and 2008 (includes
			all parties). Parties for which data are not available in a given
			year are assumed to have percent party registration equal to 0.
		
		voteavg
			Average presidential vote scores across 2004 and 2008 (includes
			all parties). Parties for which data are not available in a given
			year are assumed to have percent party registration equal to 0.
		
dist_<variable-name> (variable set)
	The distance between the actors is terms of <variable_name>,
	as defined in the node attributes file or one of the additional
	input files.
	
	<variable-name> may be one of the following:
	
		phys
			Physical distance, in 10-mile units.
		
		totalpop
			Log of the absolute difference (plus 1) of total population in 2000.
		
		pcturban
			Absolute difference in percentage of urban population 
			(in percentage points).

		pctwhite
			Absolute difference in the percentage of the population that is 
			white (in percentage points).
			
		pctnonwhite
			Absolute difference in the percentage of the population that is 
			non-white (in percentage points).
			
		pctlatino
			Absolute difference in the percentage of the population that is 
			hispanic or latino (in percentage points).
			
		pcturbanhouse
			Absolute difference in the percntage of housing units that are 
			urban (in percetage points).
			
		income
			Absolute difference in median household incomes in 1999, in thousands
			of dollars.
			
		pctpopchange
			Square-root of the absolute difference in percentage population change 
			(in percentage points) from 1990 to 2000.

in_<region>_q (variable set)
	Logical variables indicating membership in the regional networks. In order for a dyad
	to be included within a given region, both actors in the dyad must be members of
	the regional network. In order for an actor to be in a given region's network, they
	must satisfy at least one of three cirtieria: 1) they were included in the regional
	sample, 2) they were nominated as a collaborator by an actor included in the regional
	sample, or 3) they nominated as a collaborator another actor included in the regional
	sample.
	
	<region> may be one of the following:
	
		merced
			1 if both actors in dyad are members of the Merced network; 
			0, otherwise.
			
		tricounty
			1 if both actors in dyad are members of the Tri-County network; 
			0, otherwise.

		sacog
			1 if both actors in dyad are members of the Sacramento network; 
			0, otherwise.

		riverside
			1 if both actors in dyad are members of the Riverside network; 
			0, otherwise.

		sandiego
			1 if both actors in dyad are members of the San Diego network; 
			0, otherwise.
